Dual ST-84 (early 1960s)

Little is documented about the Dual ST-84. The surviving record is thin, but it appears to have been a tube integrated amplifier from the early 1960s. A period specification listing in HiFi/Stereo Review (1963, p.22) gives twin inputs for phono (4 mV), tape head (2 mV), microphone (6 mV), and tuner/aux (0.5 V). It also lists bass and treble controls, per-channel level controls, and speaker outputs for 4, 8, 16, and 32 ohms. The same listing notes a tube complement beginning with an ECC83.

Beyond that listing, the record thins out quickly. No reliable price, production span, or design history surfaced in the available material.

• Type: tube integrated amplifier (per period listing)
• Inputs (twin): phono 4 mV, tape head 2 mV, microphone 6 mV, tuner/aux 0.5 V
• Speaker outputs: 4, 8, 16, 32 ohms
• Tube complement includes ECC83

eBay Listings

Eico Tube Amplifier Knob Dots Brown ST-70 ST-40 ST-84

$8.00

Eico ST-84 Vintage Stereo Preamplifier; Beautifully Restored

$1,295

EICO ST-84 Preamp PREMIUM TONE CONTROL UPGRADE, 29751 PEC Fi

$39.99

Eico ST-84 ST84 tube stereo preamplifier manual reprint

$9.99

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